Mimir — Local AWS Cloud Emulator in One Docker Image
See your cloud, before you ship your cloud.
Run AWS locally — S3, Lambda, DynamoDB, RDS, Step Functions, API Gateway, Glue and 50+ services — with a full web console, real container-backed runtimes, and zero AWS account. A free, open-source LocalStack alternative.
Then open http://localhost:8080 — a populated local AWS cloud in under a minute.
Watch Step Functions run — locally
A real-time workflow graph: states turn blue while running and green on success, Choice branches show their conditions, and Task nodes deep-link to the local Lambda or Glue job they invoke.
27 AWS service consoles, one image
Real engines, not mocksRDS starts a real PostgreSQL container. ElastiCache runs real Redis. EKS boots real k3s. OpenSearch is the real engine.
Zero code changesPoint your AWS CLI, SDK or app at http://localhost:4566 and everything works — locally and offline.
API Gateway you can curlBuild REST & HTTP APIs in the console, wire them to Lambdas, invoke them seconds later.
Glue that actually runsReal PySpark jobs and notebooks in the official Glue runtime images — including Apache Hudi.
CloudWatch everywhereEvery service streams logs to its AWS-convention log group, exactly like the real cloud.
No port rouletteData endpoints live in a dedicated 5500–5550 range — your local Redis and Postgres stay untouched.
Mimir vs LocalStack
Mimir
LocalStack (free)
Web console
27 services, bundled
Limited resource browser
RDS / ElastiCache
Real Postgres/Redis, free
Paid tier
ECS / EKS
Real containers / k3s, free
Paid tier
Glue job execution
Real local Spark, free
Paid tier
Step Functions UI
Live workflow graph
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Price
Everything free, MIT
Free core + paid tiers
FAQ
How do I run AWS locally without an AWS account?
Run the Mimir Docker image and point your AWS CLI or SDK at http://localhost:4566. No account, no sign-up, no internet after the initial pull.
Is Mimir a free alternative to LocalStack?
Yes — MIT-licensed, and everything is free, including RDS, ECS, EKS, Cognito, Athena and Glue job execution.
Can I test Lambda functions locally?
Yes. Functions run in real runtime containers with logs, versions, aliases, function URLs and event source mappings.
